這篇文章主要介紹springboot如何整合MongoDB。
準備工作
- 安裝 MongoDB
- jdk 1.8
- maven 3.0
- idea
環境依賴
在pom文件引入spring-boot-starter-data-mongodb依賴：
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<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-mongodb</artifactId> </dependency> |
數據源配置
如果mongodb端口是默認端口，并且沒有設置密碼，可不配置，sprinboot會開啟默認的。
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spring.data.mongodb.uri=mongodb://localhost:27017/springboot-db |
mongodb設置了密碼，這樣配置：
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spring.data.mongodb.uri=mongodb://name:pass@localhost:27017/dbname |
定義一個簡單的實體
mongodb
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package com.forezp.entity;import org.springframework.data.annotation.Id;public class Customer { @Id public String id; public String firstName; public String lastName; public Customer() {} public Customer(String firstName, String lastName) { this.firstName = firstName; this.lastName = lastName; } @Override public String toString() { return String.format( "Customer[id=%s, firstName='%s', lastName='%s']", id, firstName, lastName); }} |
數據操作dao層
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public interface CustomerRepository extends MongoRepository<Customer, String> { public Customer findByFirstName(String firstName); public List<Customer> findByLastName(String lastName);} |
寫一個接口，繼承MongoRepository，這個接口有了幾本的CURD的功能。如果你想自定義一些查詢，比如根據firstName來查詢，獲取根據lastName來查詢，只需要定義一個方法即可。注意firstName嚴格按照存入的mongodb的字段對應。在典型的Java的應用程序，寫這樣一個接口的方法，需要自己實現，但是在springboot中，你只需要按照格式寫一個接口名和對應的參數就可以了，因為springboot已經幫你實現了。
測試
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@SpringBootApplicationpublic class SpringbootMongodbApplication implements CommandLineRunner { @Autowired private CustomerRepository repository; public static void main(String[] args) { SpringApplication.run(SpringbootMongodbApplication.class, args); } @Override public void run(String... args) throws Exception { repository.deleteAll(); // save a couple of customers repository.save(new Customer("Alice", "Smith")); repository.save(new Customer("Bob", "Smith")); // fetch all customers System.out.println("Customers found with findAll():"); System.out.println("-------------------------------"); for (Customer customer : repository.findAll()) { System.out.println(customer); } System.out.println(); // fetch an individual customer System.out.println("Customer found with findByFirstName('Alice'):"); System.out.println("--------------------------------"); System.out.println(repository.findByFirstName("Alice")); System.out.println("Customers found with findByLastName('Smith'):"); System.out.println("--------------------------------"); for (Customer customer : repository.findByLastName("Smith")) { System.out.println(customer); } } |
在springboot的應用程序，加入測試代碼。啟動程序，控制臺打印了：
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Customers found with findAll(): ——————————- Customer[id=58f880f589ffb696b8a6077e, firstName='Alice', lastName='Smith'] Customer[id=58f880f589ffb696b8a6077f, firstName='Bob', lastName='Smith'] Customer found with findByFirstName(‘Alice'): ——————————– Customer[id=58f880f589ffb696b8a6077e, firstName='Alice', lastName='Smith'] Customers found with findByLastName(‘Smith'): ——————————– Customer[id=58f880f589ffb696b8a6077e, firstName='Alice', lastName='Smith'] Customer[id=58f880f589ffb696b8a6077f, firstName='Bob', lastName='Smith'] |
測試通過。
源碼下載：https://github.com/forezp/SpringBootLearning
以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持服務器之家。
原文鏈接：http://blog.csdn.net/forezp/article/details/70941577
